Asco Numatics 551 - 553 Sloenoid valves are monostable spool valves in conformity with IEC 61508 Standard (2010 route 2H version) have TÜV (551 series) and EXIDA (551-553series) certified.
The monostable spool valves in conformity with IEC 61508 Standard (2010 route 2H version) have TÜV (551 series) and EXIDA (551-553 series) certified with integrity levels : SIL 2 for HFT= 0 / SIL 3 for HFT = 1
Series 551 versions according to ATEX 94/9/EC, for zones 0, 1 and 2 and series 553 air-operated versions for zones 1 and 2
All the exhaust ports of this spool valve are connectable, providing better environmental protection, particularly recommended for sensitive areas such as clean rooms, and applications in the pharmaceutical and food processing sectors
The valve offers environmental protection against the ingress of liquids, dusts or any other foreign matter (environmentally-protected construction)
The solenoid valves satisfy all relevant EC Directives